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posted an update about 1 hour ago
A patient's name in a clinical note. Their voice in an ASR transcript. A waveform header with their DOB. Three separate records, each one low-risk by itself. Together, they're enough to re-identify someone. Per-record de-identification doesn't see this. It can't. It has no memory of what came before. We built a system that does. AMPHI tracks PHI exposure across modalities and time, maintains a risk score per patient, and escalates masking automatically as exposure accumulates. When a text record and an audio record co-reference the same patient via embedding similarity, the system catches it and responds before the next record arrives. The core results: adaptive policy holds privacy at 0.991 on high-risk bursty workloads while keeping utility at 0.847. Static redaction gets the privacy number but destroys utility. Static weak masking keeps utility but leaks on high-risk bursts. The adaptive system doesn't trade one for the other. Full system is open-source. Five models, three datasets, two demo spaces, 141 passing tests. Spaces: [AMPHI Demo](https://huggingface.co/spaces/vkatg/amphi-rl-dpgraph) | [DCPG Scorer](https://huggingface.co/spaces/vkatg/dcpg-scorer-demo) Models: [DCPG Encoder](https://huggingface.co/vkatg/exposureguard-dcpg-encoder) | [Cross-Modal Risk Scorer](https://huggingface.co/vkatg/dcpg-cross-modal-phi-risk-scorer) | [PolicyNet](https://huggingface.co/vkatg/exposureguard-policynet) | [FedCRDT](https://huggingface.co/vkatg/exposureguard-fedcrdt-distill) | [DAGPlanner](https://huggingface.co/vkatg/expsoureguard-dagplanner) Datasets: [Multimodal PHI Masking](https://huggingface.co/datasets/vkatg/multimodal-phi-masking-benchmark) | [Streaming De-ID Benchmark](https://huggingface.co/datasets/vkatg/streaming-phi-deidentification-benchmark) | [DAG Remediation Traces](https://huggingface.co/datasets/vkatg/dag_remediation_traces) Code: [phi-exposure-guard on GitHub](https://github.com/azithteja91/phi-exposure-guard)
updated a model about 4 hours ago
vkatg/exposureguard-policynet
updated a model about 5 hours ago
vkatg/exposureguard-synthrewrite-t5
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